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Finding the Fourth Proportional to 285.33, 428.68 and 182.81

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Solution

The fourth proportional to 285.33, 428.68 and 182.81 is: 274.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.33 : 428.68 = 182.81 : x
  2. Step 2: Convert to fraction form
    285.33/428.68 = 182.81/x
  3. Step 3: Cross multiply
    285.33x = 428.68 × 182.81
  4. Step 4: Simplify right side
    285.33x = 78,367.02
  5. Step 5: Solve for x
    x = 78,367.02/285.33
  6. Step 6: Final answer
    x = 274.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.